RAPID CITY, S.D. – Ketel Thorstenson, LLP is celebrating its 90th year of operation in 2026, marking nearly a century of providing accounting and advisory services in Rapid City and the surrounding region. Since its establishment in 1936, the firm has focused on providing tax and accounting solutions for local businesses and individuals.
As part of the anniversary milestone, the firm announced that Mary Hlebechuk, CPA, has been named as the newest partner. Hlebechuk has worked in public accounting for more than 10 years, focusing her practice on estate planning, agriculture, and individual tax preparation.
A graduate of Black Hills State University, Hlebechuk is a member of the South Dakota CPA Society and the American Institute of Certified Public Accountants. Originally from South Heart, North Dakota, she has established a professional reputation for strategic problem-solving and collaborative leadership within the firm.
Welcoming Mary to our leadership team is an exciting step, said Nina Braun, CEO and partner at Ketel Thorstenson. Her expertise and enthusiasm for the estate planning industry strengthens our ability to serve clients as we plan for their future.
The firm enters its 90th year maintaining its founding mission of building community relationships through professional expertise. Based in Rapid City, South Dakota, the firm continues to provide a range of financial services intended to help clients achieve long-term stability and growth.
